1 /*
2 * Copyright 2011 Google Inc. All Rights Reserved.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "gtest/gtest.h"
18 #include "sfntly/font.h"
19 #include "sfntly/port/file_input_stream.h"
20 #include "sfntly/port/memory_input_stream.h"
21 #include "sfntly/port/memory_output_stream.h"
22 #include "sfntly/table/bitmap/ebdt_table.h"
23 #include "sfntly/table/bitmap/eblc_table.h"
24 #include "sfntly/table/bitmap/index_sub_table_format3.h"
25 #include "sfntly/table/bitmap/index_sub_table_format4.h"
26 #include "test/test_data.h"
27 #include "test/test_font_utils.h"
28
29 namespace sfntly {
30
31 const int32_t NUM_STRIKES = 4;
32 const int32_t STRIKE1_ARRAY_OFFSET = 0xc8;
33 const int32_t STRIKE1_INDEX_TABLE_SIZE = 0x4f4;
34 const int32_t STRIKE1_NUM_INDEX_TABLES = 1;
35 const int32_t STRIKE1_COLOR_REF = 0;
36 const int32_t STRIKE1_START_GLYPH_INDEX = 0;
37 const int32_t STRIKE1_END_GLYPH_INDEX = 623;
38 const int32_t STRIKE1_PPEM_X = 10;
39 const int32_t STRIKE1_PPEM_Y = 10;
40 const int32_t STRIKE1_BIT_DEPTH = 1;
41 const int32_t STRIKE1_FLAGS = 0x01;
42
43 const int32_t STRIKE4_SUB1_INDEX_FORMAT = 3;
44 const int32_t STRIKE4_SUB1_IMAGE_FORMAT = 1;
45 const int32_t STRIKE4_SUB1_IMAGE_DATA_OFFSET = 0x00005893;
46 const int32_t STRIKE4_SUB1_GLYPH_OFFSET[] = {
47 0x00005893, 0x00005898, 0x0000589d, 0x000058a2, 0x000058a7,
48 0x000058b2, 0x000058c2, 0x000058d0, 0x000058de, 0x000058e6 };
49 const int32_t NUM_STRIKE4_SUB1_GLYPH_OFFSET = 10;
50 const int32_t STRIKE4_SUB1_GLYPH2_LENGTH = 0x58a2 - 0x589d;
51
CommonReadingTest(Font * raw_font)52 bool CommonReadingTest(Font* raw_font) {
53 FontPtr font = raw_font;
54
55 EblcTablePtr bitmap_loca = down_cast<EblcTable*>(font->GetTable(Tag::EBLC));
56 EbdtTablePtr bitmap_table = down_cast<EbdtTable*>(font->GetTable(Tag::EBDT));
57
58 EXPECT_FALSE(bitmap_loca == NULL);
59 EXPECT_FALSE(bitmap_table == NULL);
60
61 EXPECT_EQ(bitmap_loca->NumSizes(), NUM_STRIKES);
62
63 // Strike 1
64 BitmapSizeTablePtr strike1 = bitmap_loca->GetBitmapSizeTable(0);
65 EXPECT_FALSE(strike1 == NULL);
66 EXPECT_EQ(strike1->IndexSubTableArrayOffset(), STRIKE1_ARRAY_OFFSET);
67 EXPECT_EQ(strike1->NumberOfIndexSubTables(), STRIKE1_NUM_INDEX_TABLES);
68 EXPECT_EQ(strike1->ColorRef(), STRIKE1_COLOR_REF);
69 EXPECT_EQ(strike1->StartGlyphIndex(), STRIKE1_START_GLYPH_INDEX);
70 EXPECT_EQ(strike1->EndGlyphIndex(), STRIKE1_END_GLYPH_INDEX);
71 EXPECT_EQ(strike1->PpemX(), STRIKE1_PPEM_X);
72 EXPECT_EQ(strike1->PpemY(), STRIKE1_PPEM_Y);
73 EXPECT_EQ(strike1->BitDepth(), STRIKE1_BIT_DEPTH);
74 EXPECT_EQ(strike1->FlagsAsInt(), STRIKE1_FLAGS);
75
76 // Strike 4
77 // In this test font, all strikes and all subtables have same glyphs.
78 BitmapSizeTablePtr strike4 = bitmap_loca->GetBitmapSizeTable(3);
79 EXPECT_FALSE(strike4 == NULL);
80 EXPECT_EQ(strike4->StartGlyphIndex(), STRIKE1_START_GLYPH_INDEX);
81 EXPECT_EQ(strike4->EndGlyphIndex(), STRIKE1_END_GLYPH_INDEX);
82 IndexSubTablePtr sub1 = strike4->GetIndexSubTable(0);
83 EXPECT_FALSE(sub1 == NULL);
84 EXPECT_EQ(sub1->image_format(), STRIKE4_SUB1_IMAGE_FORMAT);
85 EXPECT_EQ(sub1->first_glyph_index(), STRIKE1_START_GLYPH_INDEX);
86 EXPECT_EQ(sub1->last_glyph_index(), STRIKE1_END_GLYPH_INDEX);
87 EXPECT_EQ(sub1->image_data_offset(), STRIKE4_SUB1_IMAGE_DATA_OFFSET);
88
89 for (int32_t i = 0; i < NUM_STRIKE4_SUB1_GLYPH_OFFSET; ++i) {
90 EXPECT_EQ(sub1->GlyphOffset(i), STRIKE4_SUB1_GLYPH_OFFSET[i]);
91 }
92 return true;
93 }
94
TestReadingBitmapTable()95 bool TestReadingBitmapTable() {
96 FontFactoryPtr factory;
97 factory.Attach(FontFactory::GetInstance());
98 FontArray font_array;
99 LoadFont(SAMPLE_BITMAP_FONT, factory, &font_array);
100 FontPtr font = font_array[0];
101 EXPECT_TRUE(CommonReadingTest(font));
102
103 EblcTablePtr bitmap_loca = down_cast<EblcTable*>(font->GetTable(Tag::EBLC));
104 BitmapSizeTablePtr strike1 = bitmap_loca->GetBitmapSizeTable(0);
105 BitmapSizeTablePtr strike4 = bitmap_loca->GetBitmapSizeTable(3);
106 IndexSubTablePtr sub1 = strike4->GetIndexSubTable(0);
107
108 EXPECT_EQ(strike1->IndexTableSize(), STRIKE1_INDEX_TABLE_SIZE);
109 EXPECT_EQ(sub1->index_format(), STRIKE4_SUB1_INDEX_FORMAT);
110
111 // Strike 4 Index Sub Table 1 is a Format 3
112 IndexSubTableFormat3Ptr sub3 =
113 down_cast<IndexSubTableFormat3*>(strike4->GetIndexSubTable(0));
114 EXPECT_FALSE(sub3 == NULL);
115 BitmapGlyphInfoPtr info;
116 info.Attach(sub3->GlyphInfo(2));
117 EXPECT_EQ(info->glyph_id(), 2);
118 EXPECT_EQ(info->block_offset(), STRIKE4_SUB1_IMAGE_DATA_OFFSET);
119 EXPECT_EQ(info->start_offset(),
120 STRIKE4_SUB1_GLYPH_OFFSET[2] - STRIKE4_SUB1_GLYPH_OFFSET[0]);
121 EXPECT_EQ(info->format(), STRIKE4_SUB1_IMAGE_FORMAT);
122 EXPECT_EQ(info->length(), STRIKE4_SUB1_GLYPH2_LENGTH);
123
124 return true;
125 }
126
127 // Function in subset_impl.cc
128 extern
129 void SubsetEBLC(EblcTable::Builder* eblc, const BitmapLocaList& new_loca);
130
TestIndexFormatConversion()131 bool TestIndexFormatConversion() {
132 FontFactoryPtr factory;
133 factory.Attach(FontFactory::GetInstance());
134 FontBuilderArray builder_array;
135 BuilderForFontFile(SAMPLE_BITMAP_FONT, factory, &builder_array);
136
137 FontBuilderPtr font_builder;
138 font_builder = builder_array[0];
139 EblcTableBuilderPtr eblc_builder =
140 down_cast<EblcTable::Builder*>(font_builder->GetTableBuilder(Tag::EBLC));
141 BitmapLocaList new_loca;
142 eblc_builder->GenerateLocaList(&new_loca);
143 SubsetEBLC(eblc_builder, new_loca); // Format 3 -> 4
144
145 FontPtr new_font;
146 new_font.Attach(font_builder->Build());
147
148 // Serialize and reload the serialized font.
149 MemoryOutputStream os;
150 factory->SerializeFont(new_font, &os);
151
152 #if defined (SFNTLY_DEBUG_BITMAP)
153 SerializeToFile(&os, "anon-mod.ttf");
154 #endif
155
156 MemoryInputStream is;
157 is.Attach(os.Get(), os.Size());
158 FontArray font_array;
159 factory->LoadFonts(&is, &font_array);
160 new_font = font_array[0];
161
162 EXPECT_TRUE(CommonReadingTest(new_font));
163
164 // Strike 4 Index Sub Table 1 is a Format 4
165 EblcTablePtr bitmap_loca =
166 down_cast<EblcTable*>(new_font->GetTable(Tag::EBLC));
167 BitmapSizeTablePtr strike4 = bitmap_loca->GetBitmapSizeTable(3);
168 IndexSubTableFormat4Ptr sub4 =
169 down_cast<IndexSubTableFormat4*>(strike4->GetIndexSubTable(0));
170 EXPECT_FALSE(sub4 == NULL);
171
172 // And this subtable shall have exactly the same offset as original table
173 // since no subsetting happens.
174 FontArray original_font_array;
175 LoadFont(SAMPLE_BITMAP_FONT, factory, &original_font_array);
176 FontPtr font = original_font_array[0];
177 EXPECT_FALSE(font == NULL);
178 EblcTablePtr original_loca = down_cast<EblcTable*>(font->GetTable(Tag::EBLC));
179 EXPECT_FALSE(original_loca == NULL);
180 BitmapSizeTablePtr original_strike4 = bitmap_loca->GetBitmapSizeTable(3);
181 EXPECT_FALSE(original_strike4 == NULL);
182 IndexSubTableFormat3Ptr sub3 =
183 down_cast<IndexSubTableFormat3*>(strike4->GetIndexSubTable(0));
184 EXPECT_FALSE(sub3 == NULL);
185 EXPECT_EQ(strike4->StartGlyphIndex(), original_strike4->StartGlyphIndex());
186 EXPECT_EQ(strike4->EndGlyphIndex(), original_strike4->EndGlyphIndex());
187 for (int32_t i = strike4->StartGlyphIndex();
188 i <= strike4->EndGlyphIndex(); ++i) {
189 BitmapGlyphInfoPtr info, original_info;
190 info.Attach(sub4->GlyphInfo(i));
191 original_info.Attach(sub3->GlyphInfo(i));
192 EXPECT_EQ(info->format(), original_info->format());
193 EXPECT_EQ(info->glyph_id(), original_info->glyph_id());
194 EXPECT_EQ(info->length(), original_info->length());
195 EXPECT_EQ(info->offset(), original_info->offset());
196 }
197
198 return true;
199 }
200
201 } // namespace sfntly
202
TEST(BitmapTable,Reading)203 TEST(BitmapTable, Reading) {
204 ASSERT_TRUE(sfntly::TestReadingBitmapTable());
205 }
206
TEST(BitmapTable,IndexFormatConversion)207 TEST(BitmapTable, IndexFormatConversion) {
208 ASSERT_TRUE(sfntly::TestIndexFormatConversion());
209 }
210